UPDATE 12/1/15 @ 10:45 a.m.
ASHLAND, Ky. (WSAZ) -- AK Steel in Ashland was the source of that loud "boom" that was heard across the area early Tuesday.
Viewers called WSAZ saying the sound happened between 5:40 a.m. and 5:45 a.m. Tuesday and in some instances, the "boom" shook their house.
A spokesperson for the AK tells WSAZ workers were moving hot slag when it interacted with the heavy rain that was moving across the area, creating a steam eruption and the loud noise.
Slag is a waste by-product of steel making.
The spokesperson says there were no injuries and the interaction had no impact on operations.
ORIGINAL STORY 12/1/15 @ 6:45 A.M.
HUNTINGTON, W.Va. (WSAZ) -- People from Ashland, Ironton, Huntington, and Wayne County, W.Va. have reported hearing a loud "boom" sound early Tuesday morning.
Callers to WSAZ say the sound happened between 5:40 a.m. and 5:45 a.m. Tuesday and in some instances, the "boom" shook their house.
Dispatchers throughout the Tri State are unsure what happened but confirm they are also receiving reports of a mysterious noise.
There is no confirmation what may have caused the sound, but some people believe it came from an industrial business.
Keep clicking on WSAZ Mobile and WSAZ.com for more information.